Trolley-wheel controller.



PATENTED SEPT. 27, 1904.

B. F. JACKSON. TROLLEY WHEEL CONTROLLER.

APPLICATION FILED AUG.15, 1902.

N0 MODEL.

Patented September 27, 1904.

BENJAMIN F. JACKSON, OF BOSTON, MASSACHUSETTS.

TROLLEY-WHEEL CONTROLLER.

SPECIFICATION forming part of Letters Patent No. 771,206, dated September 2'7, 1904.

Application filed August 15, 1902.

T all whom it may concern:

Be it known that I, BENJAMIN F. JACKSON, a citizen of the United States,residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Trolley-VVheel Controllers, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention has reference to improvements in trolley-rope controllers or tenders adapted for use on electric conveyances provided with trolley arms and ropes extending therefrom,,whereby a tension is maintained on the rope.

The object of the invention is to so construct a trolley-rope controller that upon a sudden impulse thereof, as by the sudden spring of the trolley-arm, the device may be automatically locked against the letting out of the rope, while the rope may be let out or taken up under gradual movement of said arm.

The object of the invention is also to simplify the construction and to facilitate the operation of a device of this character.

The invention consists in the peculiar construction of the winding drum and in the novel combination therewith of the tensionspring.

The invention also consists in the windingdrum and in the peculiar means for locking the same against rotation in one direction.

The invention also consists in such other novel features of construction and combination of parts as shall hereinafter be more fully described, and pointed out in the claims.

Figure 1 represents a vertical sectional view of the improved controller, showing the construction thereof. Fig. 2 represents a crosssectional view of the same, taken on line 2 2, Fig. 1.

Similar numbers of reference designate corresponding parts throughout.

As shown in the drawings, 5 represents a casing, which may be furnished with any suitable means for securing the same to a carfender. This casing has the preferably annular wall 6, with its opening 7, the axiallydisposed shaft 8, furnished with the enlarge- Serial No. 119,726. (No model.)

ment 9, and the series of fixed pawl-teeth 1O 10..

WVithin the casing 5 is journaled on the shaft 8 the drum 11, having the plate 12, with its lip 13, and the sleeve 14, the outer edge of the drum having a series of sockets 15, and adjacent to this edge is a screw-threaded perforation in which the screw 16 works.

Fitting within the outer portion of the drum 11 is the collar 17, having the flange 18 and the groove 19, and on one portion of the flange 18 is mounted the projection 20, having the recess 21 at its outer end and carrying the spring-pressed pin 22, having the handle 23 adapted to seat itself in said recess when turned to register therewith, whereby the pin 22 is permitted to move inward under the action of its spring to engage said pin with one of the sockets 15 in the edge of the drum 11 to lock the flange, 18 and its collar 17 to said drum against independent rotation. To the inner portion of the collar 17 is secured the outer end of the coiled tension-spring 24, the inner end of which is secured to the shaft 8. The closing-cap 25 has the sleeve 26 fitting the shaft 8, any means, as thescrew 27, being used to secure the cap in place.

Between the plate 12 of the drum and the casing 5 is the pawl 28, curved, as shown, to partially embrace the shoulder 9 of the shaft and having the pawl-tooth 29. From the pawl projects the pin 30, which is pivotally engaged in a perforation of the plate 12, and to this base portion of the pawl is secured one end of the retracting-spring 31, the other end of which is wrapped around the base 9 of the shaft 8'and exerts frictional contact thereon.

The pin 30 of the pawl 28 having first been inserted in its perforation of the plate 12 and secured, if desired, the collar 17 carrying the spring 24, is now inserted in the drum, and the screw 16 is screwed into place to engage in the groove 19 of said collar. The sleeve 14 of the drum is now slipped over the shaft 8, and the inner end of the spring 24 is secured to the shaft 8, the collar 17 then being rotated in the drum to wind up the spring 24 to the desired tension, and the pin 22 being engaged in one of the sockets 15 to hold these parts from independent rotation. The opening within the collar 17 is then closed by the cap 25, the sleeve of which is passed over the end of the shaft 8, and the screw 27 is secured in place. The rope A is of course secured to the drum 11 before said drum is inserted in the wall of the casing. A gradual pull on this rope will now be resisted in more or less degree by the spring 24 to let out the rope under an exertion of pressure greater than the strain of the spring and to take up the slack when said pressure is released. Under a sudden pull of the rope the drum 11 will be given a sudden rotative impetus which will cause the pawl 28 to swing outward by centrifugal action against the resistance of the pawl-spring 31, and the pawl-tooth 29 will engage one of the teeth of the'easing, and thus lock the drum from rotation to prevent the undue letting out of the rope. When the rope is subsequently drawn toward the drum, the slack is taken up there by under the action of the spring 24, and the pawl-tooth being released by such reverse rotation of the drum the retractive strain of the spring 31 returns the pawl to the inoperative position shown in Fig. 2 of the drawings.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A trolley-rope controller comprising a casing having an axially-disposed shaft, a drum 'on said shaft, a collar fitting into said drum and having a laterally-enlarged flange, means for adjustably securing the flange to the drum, and a spring secured at its outer end to said collar and at its inner end to the shaft.

2. The combination with the casing 5 having the wall 6, the shaft 8, and the teeth 10 10, of the drum 11 having the plate 12 and the sleeve 14 rotatable on said shaft, the pawl 28 pivotally mounted on the plate 12 and adapted, at times, to swing into engagement with one of said teeth, and the spring 31 secured at one end to the pawl and having its other end wrapped about said shaft.

3. The combination with the casing 5 having the shaft 8 and the teeth 10 10, the drum 11 having the sleeve 1 and the sockets 15 15 and provided with the screw 16, and means carried by said drum for engaging the teeth 10 10 at times, of the collar 17 having the flange 18 and the groove 19, adapted to be engaged by the screw 16, the projection 20 on said flange 18, the spring-pressed pin 22 working through the perforation in said projection to enter one of the sockets 15, and the spring 24 secured at its outer end to said collar and at its inner end to the shaft 8, as and for the purpose described.

In testimony whereof I aflix my signature in presence of two witnesses.

BENJAMIN F. JACKSON.

Witnesses:

WV. R. Rnnvn, H. J. MILLER. 

